Note 3 - Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

		March 31, 2014						December 31, 2013
	Fair Value Hierarchy	Cost		Unrealized Gain		Fair Value		Cost		Unrealized Gain		Fair Value
Asset Backed	Level 2	$	442	$	1	$	443	$	455	$	1	$	456
Corporate Bonds	Level 2		164		-		164		164		1		165
US Treasuries	Level 2		4,010		-		4,010		4,500		-		4,500
Total		$	4,616	$	1	$	4,617	$	5,119	$	2	$	5,121